Parameters
WE
Range of values
Supply air humidity set point
50 %rH 0 to 100 %rH
K
P
0.5
0.1 to 99.9
T
N
60 sec
1 to 999 sec
T
V
– – –
– – – to 999 sec
5.2.2 Exhaust air/room humidity control
The sensor input F7 is the control variable input by default. Alternatively, the analog input
AE4 can be used.
The exhaust air or room humidity control is implemented as a PID control algorithm with ad-
justable
Exhaust air humidity set point or Room humidity set point. The humidity control loop
can be used just for humidifying or for humidifying and dehumidifying depending on the
control method. In humidifying and dehumidifying mode, the cooling coil is controlled in se-
quence to the humidifier.
The requirements of the humidity control loop for dehumidifying and the temperature control
loop for cooling are converted internally into a common control signal Y3 for the cooling
coil. Each output can be adapted to the dynamics of the corresponding system components
by means of the
K
P
, T
N
and
T
V
control parameters that are adjustable. A manual set point
correction has an unrestricted effect on the control by the shifting the set point.
Functions
WE
Configuration
Control method
Exhaust air/room control (–> page 17)
Sensor F7, exhaust air/room control
or
assignmet of inputs AE1 to AE4
OFF
Fb7 = ON or
Fb18 = ON,
option:
AE4F7
Parameters
WE
Range of values
Exhaust air humidity set point
or
room humidity set point
50 %rH
50 %rH
0 to 100 %rH
0 to 100 %rH
K
P
0.5
0.1 to 99.9
T
N
60 sec
1 to 999 sec
T
V
– – –
– – – to 999 sec
5.2.3 Exhaust air or room humidity cascade control
The sensor input F7 is the control variable input for exhaust air or room humidity and the
sensor input F6 is the control variable input for supply air humidity by default. Alternatively,
the analog input AE4 can be used for exhaust air or room humidity or the analog input AE2
for the supply air humidity.
42
EB 5477 EN
Control methods and system components